* Galaxy: This is the most common and accurate term. A galaxy is a massive, gravitationally bound system of stars, interstellar gas and dust, and dark matter. Our own galaxy is the Milky Way.
* Star cluster: While typically smaller than galaxies, star clusters can contain millions of stars. These are categorized as either open clusters (loosely bound) or globular clusters (tightly packed).
* Stellar association: A less common term, this refers to a group of stars that share a common origin but are less tightly bound than a star cluster.
Ultimately, the best name depends on the specific characteristics of the collection of stars you are referring to.
